You captured the quad (4x) from the best possible vantage point, standing on a bridge as the boat went by. When each rower has two oars the sport is called "sculling" as in your photo. When the rowers have only one oar each, the boat is called a "sweep." In high school and university I rowed in a sweep (8+); then my son did the same, but reached much higher success; now in a third generation, my 15-year old grandson is rowing in high school in a sweep.

Here is a "sweep" (8+) also called an "eight". Four years ago, my son who is now a doctor was rowing in a Princeton alumni "eight." They now call them selves "Fat-Cats" and alternate in Princeton's orange and black colors.

Warm regards and thank you for a stroll down memory lane and sharing this photo.